406oc.co.uk

Right, now I've managed to silence the pile of warnings and have a functioning speedo, I can move on to other niggles!

I appear to be missing a hose from one of the solenoids on the bulkhead -



What should be attached to said thingy? No doubt a peer under the bonnet would reveal the answer, but it's dark and raining, and I'm lazy.

The left hand one is for the EGR.

If it's a HDi 90 then the right hand one is for the air doser.

If it's a HDi 110 then the right hand one is for the turbo.

If it's a 136 then there should be three of them


This also means that you have a vacuum leak.

rwb wrote:If it's a HDi 110 then the right hand one is for the turbo.

That may explain why the power delivery is... interesting.

if it was for the turbo you would have the engine light on, an over and under boost fault code and be in limp mode.

what is it about the power delivery that you feel is wrong?

edit
its an 03 you should have 3 valves on there for a 110 one for the air doser one for the egr and the turbo but you have one missing

the power delivery will be affected as the egr valve is venting to atmos this is not good and will affect your brakes and power delivery as there is no vac in the system that works with vac, so get a bit of pipe and bit of sum thing solid and a jubilee clip and block it up

the valves are color coded blue for egr, gray for turbo and unmarked for air doser.

the 136bhp engines have the vnt turbo which i think is controlled directly by the ecu with no vac feed but i could be wrong

My 2003 110 only has 2 valves as it hasn't got an air doser fitted.

grasmere59 wrote:My 2003 110 only has 2 valves as it hasn't got an air doser fitted.

Yep, same here - 53 plate 110, but no doser/dozer/thingybob valve.

Turns out it was the EGR hose (someone has obviously swapped the hoses and connectors over - odd, considering both valves work fine!) which was hanging loose - popped it back on, secured it, all sorted, and I now have much better power under 1800rpm - it was a bit of a yawning chasm before the turbo kicked in, now it's a much smoother rise of torque.

They took the air doser off the 110s at the end.
So the 90s have 1 or 2 if doser,
the 110s have 2 or 3, and
the 136s always have 3.


Anyway, glad it's sorted